From patchwork Thu Oct 22 13:22:21 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daire McNamara X-Patchwork-Id: 1386273 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=quarantine dis=none) header.from=microchip.com Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=microchip.com header.i=@microchip.com header.a=rsa-sha256 header.s=mchp header.b=F2zCw50d; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4CH7ML4hgrz9sVW for ; Fri, 23 Oct 2020 00:22:38 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2507172AbgJVNWf (ORCPT ); Thu, 22 Oct 2020 09:22:35 -0400 Received: from esa3.microchip.iphmx.com ([68.232.153.233]:43662 "EHLO esa3.microchip.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2507167AbgJVNWf (ORCPT ); Thu, 22 Oct 2020 09:22:35 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1603372955; x=1634908955; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version; bh=roRpsYdtoRbYCNEFe5JThtGTJAd4WNqe6E3N8dhPrII=; b=F2zCw50d8i7JYLxmdLCJKp4qam/TmIeJWkUSHB352fMNHod+mlJALJzY vKlW50GpEBfwEc3UYj+3k+6W1NqYo0BWzx2qV5rkMFqVY0ovs0fqJo3XD xUDOLSKImf7Fm3yOhTx74OHP/YYUxV1sOOqJQjwC61RdkP4VKmhc49Oca fC7boP5Us58Gf2x7dVZmqMq9q5n/mxnbgdlARwuQGXvP1PXkl3JzyGWuJ zC4b/ocvcix0s98YDW16DeD1bICY3J+tS4wCVNg3bFySTIOnMe9UCILwo H5D6239oIutdeZg5tIZuN46VFEpTFCbtdhIZaTn3sgLF0U9GyGuDUM0xM w==; IronPort-SDR: 68X5FedlTA7yWJK0HCUk4wJMT9pBI0EBxyzLS0wHhBjCeHoa1O1KBUzno+IxcMIXw7axIh6nZY x0mXquYssDZ7H93QSKadVUVcEUwVmpxT8IHm10ZPOkDHANhYl9asI86vKQryh3QWD/lIW1jP3+ QqRS10OzCUVHp7hWHxUSD4AJXuXRoIQudZhFWjpBJpfWLnROEJj6ll0ywfHeXDX1lSe7/u6Jdl TrtGbWrrSfUH01FjewOi9ELwFUE2sAucdcV0R7PmpoMYo/HrYxqK/QmLncWV6Q1HrlRCam5xtT 1tI= X-IronPort-AV: E=Sophos;i="5.77,404,1596524400"; d="scan'208";a="96256404" Received: from smtpout.microchip.com (HELO email.microchip.com) ([198.175.253.82]) by esa3.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 22 Oct 2020 06:22:33 -0700 Received: from chn-vm-ex01.mchp-main.com (10.10.85.143) by chn-vm-ex03.mchp-main.com (10.10.85.151) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1979.3; Thu, 22 Oct 2020 06:22:32 -0700 Received: from ryzen.microchip.com (10.10.115.15) by chn-vm-ex01.mchp-main.com (10.10.85.143) with Microsoft SMTP Server id 15.1.1979.3 via Frontend Transport; Thu, 22 Oct 2020 06:22:30 -0700 From: To: , , , , , , CC: Daire McNamara Subject: [PATCH v17 1/3] PCI: Call platform_set_drvdata earlier in devm_pci_alloc_host_bridge Date: Thu, 22 Oct 2020 14:22:21 +0100 Message-ID: <20201022132223.17789-2-daire.mcnamara@microchip.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20201022132223.17789-1-daire.mcnamara@microchip.com> References: <20201022132223.17789-1-daire.mcnamara@microchip.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org From: Daire McNamara Many drivers can now use pci_host_common_probe() directly. Their hardware window setup can be moved from their 'custom' probe functions to individual driver init functions. Signed-off-by: Daire McNamara --- drivers/pci/controller/pci-host-common.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/pci/controller/pci-host-common.c b/drivers/pci/controller/pci-host-common.c index 6ce34a1deecb..6ab694f8d283 100644 --- a/drivers/pci/controller/pci-host-common.c +++ b/drivers/pci/controller/pci-host-common.c @@ -64,6 +64,8 @@ int pci_host_common_probe(struct platform_device *pdev) if (!bridge) return -ENOMEM; + platform_set_drvdata(pdev, bridge); + of_pci_check_probe_only(); /* Parse and map our Configuration Space windows */ @@ -78,8 +80,6 @@ int pci_host_common_probe(struct platform_device *pdev) bridge->sysdata = cfg; bridge->ops = (struct pci_ops *)&ops->pci_ops; - platform_set_drvdata(pdev, bridge); - return pci_host_probe(bridge); } EXPORT_SYMBOL_GPL(pci_host_common_probe); From patchwork Thu Oct 22 13:22:22 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daire McNamara X-Patchwork-Id: 1386275 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=quarantine dis=none) header.from=microchip.com Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=microchip.com header.i=@microchip.com header.a=rsa-sha256 header.s=mchp header.b=jsJ6kMzJ; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4CH7MN2YdJz9sVq for ; Fri, 23 Oct 2020 00:22:40 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2507417AbgJVNWh (ORCPT ); Thu, 22 Oct 2020 09:22:37 -0400 Received: from esa4.microchip.iphmx.com ([68.232.154.123]:22266 "EHLO esa4.microchip.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2507167AbgJVNWg (ORCPT ); Thu, 22 Oct 2020 09:22:36 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1603372956; x=1634908956; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version; bh=/nmevcmTggs/V2C84tdJw1RHRNhwdqwCc6w8l04Xe+s=; b=jsJ6kMzJ+CPcEUr5m+/ujmzrb8uic0UCuOj1AbpiveH2KOXSgAbkq06E D4dStT98SS+sVoD8TJhb7wIXHZFpJrOnw0KDfKVb4d0BjnFK0porSEsKh H7KGwesUn1rZbJGfMPBpK+znWbne8f16wtDMLZ8H6M3rIl9ru/F4UX2TY im7ddNZkRziAuUPd9N1bwAh0WP2llw8wIDb5uCkZ9jlYvAQvjMrX/un1Z lS3ug26HLfhU8xrrGVWhwT3elxgsnJ3wmTXF2K4mWLlPt95FDo4UDQ+b+ +yZNcmw6ZsVLUcbJKyKGxHqZMhPciwVLNzpca4ZgLvcYTt/kEXaK83ufY Q==; IronPort-SDR: x7dGBC8oAnGxBetyC2TDG4Ymf535j21POleDndD14pTyQqwCIyEPLVqxlivMeFd+RZj22PPwhe qw3DZv1mfy42FxJ92xI6upcihUdiLHHgT6xjS/g13X2GUUei4EC876wYqDZo7dPXGQLcoVx66K Ev77/jlv1TE1RLywHt+W2iWIjLc2EBa8nr2xz/y9EcMoJXzlhdgkkXwhBeiugqeQXDdvONJSbb bcSZJivU2MEiKfIxTCxScwXlhmbSAIFARSfHS/rkAEBqOpWfCasbDZqMaetUlUxGXlLwqRQSYY Wfs= X-IronPort-AV: E=Sophos;i="5.77,404,1596524400"; d="scan'208";a="91058341" Received: from smtpout.microchip.com (HELO email.microchip.com) ([198.175.253.82]) by esa4.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 22 Oct 2020 06:22:35 -0700 Received: from chn-vm-ex01.mchp-main.com (10.10.85.143) by chn-vm-ex04.mchp-main.com (10.10.85.152) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1979.3; Thu, 22 Oct 2020 06:22:34 -0700 Received: from ryzen.microchip.com (10.10.115.15) by chn-vm-ex01.mchp-main.com (10.10.85.143) with Microsoft SMTP Server id 15.1.1979.3 via Frontend Transport; Thu, 22 Oct 2020 06:22:32 -0700 From: To: , , , , , , CC: Daire McNamara Subject: [PATCH v17 2/3] dt-bindings: PCI: microchip: Add Microchip PolarFire host binding Date: Thu, 22 Oct 2020 14:22:22 +0100 Message-ID: <20201022132223.17789-3-daire.mcnamara@microchip.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20201022132223.17789-1-daire.mcnamara@microchip.com> References: <20201022132223.17789-1-daire.mcnamara@microchip.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org From: Daire McNamara Add device tree bindings for the Microchip PolarFire PCIe controller when configured in host (Root Complex) mode. Signed-off-by: Daire McNamara --- .../bindings/pci/microchip,pcie-host.yaml | 93 +++++++++++++++++++ 1 file changed, 93 insertions(+) create mode 100644 Documentation/devicetree/bindings/pci/microchip,pcie-host.yaml diff --git a/Documentation/devicetree/bindings/pci/microchip,pcie-host.yaml b/Documentation/devicetree/bindings/pci/microchip,pcie-host.yaml new file mode 100644 index 000000000000..b55941826b44 --- /dev/null +++ b/Documentation/devicetree/bindings/pci/microchip,pcie-host.yaml @@ -0,0 +1,93 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/pci/microchip,pcie-host.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Microchip PCIe Root Port Bridge Controller Device Tree Bindings + +maintainers: + - Daire McNamara + +allOf: + - $ref: /schemas/pci/pci-bus.yaml# + +properties: + compatible: + const: microchip,pcie-host-1.0 # PolarFire + + reg: + maxItems: 2 + + reg-names: + items: + - const: cfg + - const: apb + + interrupts: + minItems: 1 + maxItems: 2 + items: + - description: PCIe host controller + - description: builtin MSI controller + + interrupt-names: + minItems: 1 + maxItems: 2 + items: + - const: pcie + - const: msi + + ranges: + maxItems: 1 + + dma-ranges: + maxItems: 1 + + msi-controller: + description: Identifies the node as an MSI controller. + + msi-parent: + description: MSI controller the device is capable of using. + +required: + - reg + - reg-names + - dma-ranges + - "#interrupt-cells" + - interrupts + - interrupt-map-mask + - interrupt-map + - msi-controller + +unevaluatedProperties: false + +examples: + - | + soc { + #address-cells = <2>; + #size-cells = <2>; + pcie0: pcie@2030000000 { + compatible = "microchip,pcie-host-1.0"; + reg = <0x20 0x30000000 0x0 0x4000000>, + <0x20 0x0 0x0 0x100000>; + reg-names = "cfg", "apb"; + device_type = "pci"; + #address-cells = <3>; + #size-cells = <2>; + #interrupt-cells = <1>; + interrupts = <32>; + interrupt-map-mask = <0x0 0x0 0x0 0x7>; + interrupt-map = <0 0 0 1 &pcie0 0>, + <0 0 0 2 &pcie0 1>, + <0 0 0 3 &pcie0 2>, + <0 0 0 4 &pcie0 3>; + interrupt-parent = <&plic0>; + interrupt-controller; + msi-parent = <&pcie0>; + msi-controller; + bus-range = <0x00 0x7f>; + ranges = <0x03000000 0x0 0x40000000 0x0 0x40000000 0x0 0x20000000>; + dma-ranges = <0x02000000 0x0 0x00000000 0x0 0x00000000 0x1 0x00000000>; + }; + }; From patchwork Thu Oct 22 13:22:23 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daire McNamara X-Patchwork-Id: 1386276 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=quarantine dis=none) header.from=microchip.com Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=microchip.com header.i=@microchip.com header.a=rsa-sha256 header.s=mchp header.b=GVr2Dq1O; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4CH7MR0Wyvz9sVM for ; Fri, 23 Oct 2020 00:22:43 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2507167AbgJVNWj (ORCPT ); Thu, 22 Oct 2020 09:22:39 -0400 Received: from esa2.microchip.iphmx.com ([68.232.149.84]:12066 "EHLO esa2.microchip.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2506975AbgJVNWj (ORCPT ); Thu, 22 Oct 2020 09:22:39 -0400 DKIM-Signature: v=1; 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22 Oct 2020 06:22:36 -0700 Received: from chn-vm-ex01.mchp-main.com (10.10.85.143) by chn-vm-ex03.mchp-main.com (10.10.85.151) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1979.3; Thu, 22 Oct 2020 06:22:36 -0700 Received: from ryzen.microchip.com (10.10.115.15) by chn-vm-ex01.mchp-main.com (10.10.85.143) with Microsoft SMTP Server id 15.1.1979.3 via Frontend Transport; Thu, 22 Oct 2020 06:22:34 -0700 From: To: , , , , , , CC: Daire McNamara Subject: [PATCH v17 3/3] PCI: microchip: Add host driver for Microchip PCIe controller Date: Thu, 22 Oct 2020 14:22:23 +0100 Message-ID: <20201022132223.17789-4-daire.mcnamara@microchip.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20201022132223.17789-1-daire.mcnamara@microchip.com> References: <20201022132223.17789-1-daire.mcnamara@microchip.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org From: Daire McNamara Add support for the Microchip PolarFire PCIe controller when configured in host (Root Complex) mode. Signed-off-by: Daire McNamara --- drivers/pci/controller/Kconfig | 10 + drivers/pci/controller/Makefile | 1 + drivers/pci/controller/pcie-microchip-host.c | 541 +++++++++++++++++++ 3 files changed, 552 insertions(+) create mode 100644 drivers/pci/controller/pcie-microchip-host.c diff --git a/drivers/pci/controller/Kconfig b/drivers/pci/controller/Kconfig index 4a7afbe189f8..8d8cd0d040bf 100644 --- a/drivers/pci/controller/Kconfig +++ b/drivers/pci/controller/Kconfig @@ -297,6 +297,16 @@ config PCI_LOONGSON Say Y here if you want to enable PCI controller support on Loongson systems. +config PCIE_MICROCHIP_HOST + bool "Microchip AXI PCIe host bridge support" + depends on PCI_MSI && OF + select PCI_MSI_IRQ_DOMAIN + select GENERIC_MSI_IRQ_DOMAIN + select PCI_HOST_COMMON + help + Say Y here if you want kernel to support the Microchip AXI PCIe + Host Bridge driver. + source "drivers/pci/controller/dwc/Kconfig" source "drivers/pci/controller/mobiveil/Kconfig" source "drivers/pci/controller/cadence/Kconfig" diff --git a/drivers/pci/controller/Makefile b/drivers/pci/controller/Makefile index bcdbf49ab1e4..fcbbee94dc51 100644 --- a/drivers/pci/controller/Makefile +++ b/drivers/pci/controller/Makefile @@ -28,6 +28,7 @@ obj-$(CONFIG_PCIE_ROCKCHIP_EP) += pcie-rockchip-ep.o obj-$(CONFIG_PCIE_ROCKCHIP_HOST) += pcie-rockchip-host.o obj-$(CONFIG_PCIE_MEDIATEK) += pcie-mediatek.o obj-$(CONFIG_PCIE_TANGO_SMP8759) += pcie-tango.o +obj-$(CONFIG_PCIE_MICROCHIP_HOST) += pcie-microchip-host.o obj-$(CONFIG_VMD) += vmd.o obj-$(CONFIG_PCIE_BRCMSTB) += pcie-brcmstb.o obj-$(CONFIG_PCI_LOONGSON) += pci-loongson.o diff --git a/drivers/pci/controller/pcie-microchip-host.c b/drivers/pci/controller/pcie-microchip-host.c new file mode 100644 index 000000000000..16099154458f --- /dev/null +++ b/drivers/pci/controller/pcie-microchip-host.c @@ -0,0 +1,541 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Microchip AXI PCIe Bridge host controller driver + * + * Copyright (c) 2018 - 2020 Microchip Corporation. All rights reserved. + * + * Author: Daire McNamara + * + * Based on: + * pcie-rcar.c + * pcie-xilinx.c + * pcie-altera.c + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include "../pci.h" + +/* Number of MSI IRQs */ +#define MC_NUM_MSI_IRQS 32 +#define MC_NUM_MSI_IRQS_CODED 5 + +/* PCIe Bridge Phy and Controller Phy offsets */ +#define MC_PCIE1_BRIDGE_ADDR 0x00008000u +#define MC_PCIE1_CTRL_ADDR 0x0000a000u + +/* PCIe Controller Phy Regs */ +#define MC_SEC_ERROR_INT 0x28 +#define SEC_ERROR_INT_TX_RAM_SEC_ERR_INT GENMASK(3, 0) +#define SEC_ERROR_INT_RX_RAM_SEC_ERR_INT GENMASK(7, 4) +#define SEC_ERROR_INT_PCIE2AXI_RAM_SEC_ERR_INT GENMASK(11, 8) +#define SEC_ERROR_INT_AXI2PCIE_RAM_SEC_ERR_INT GENMASK(15, 12) +#define MC_SEC_ERROR_INT_MASK 0x2c +#define MC_DED_ERROR_INT 0x30 +#define DED_ERROR_INT_TX_RAM_DED_ERR_INT GENMASK(3, 0) +#define DED_ERROR_INT_RX_RAM_DED_ERR_INT GENMASK(7, 4) +#define DED_ERROR_INT_PCIE2AXI_RAM_DED_ERR_INT GENMASK(11, 8) +#define DED_ERROR_INT_AXI2PCIE_RAM_DED_ERR_INT GENMASK(15, 12) +#define MC_DED_ERROR_INT_MASK 0x34 +#define MC_ECC_CONTROL 0x38 +#define ECC_CONTROL_AXI2PCIE_RAM_ECC_BYPASS BIT(27) +#define ECC_CONTROL_PCIE2AXI_RAM_ECC_BYPASS BIT(26) +#define ECC_CONTROL_RX_RAM_ECC_BYPASS BIT(25) +#define ECC_CONTROL_TX_RAM_ECC_BYPASS BIT(24) +#define MC_LTSSM_STATE 0x5c +#define LTSSM_L0_STATE 0x10 +#define MC_PCIE_EVENT_INT 0x14c +#define PCIE_EVENT_INT_L2_EXIT_INT BIT(0) +#define PCIE_EVENT_INT_HOTRST_EXIT_INT BIT(1) +#define PCIE_EVENT_INT_DLUP_EXIT_INT BIT(2) +#define PCIE_EVENT_INT_L2_EXIT_INT_MASK BIT(16) +#define PCIE_EVENT_INT_HOTRST_EXIT_INT_MASK BIT(17) +#define PCIE_EVENT_INT_DLUP_EXIT_INT_MASK BIT(18) + +/* PCIe Bridge Phy Regs */ +#define MC_PCIE_PCI_IDS_DW1 0x9c + +/* PCIe Config space MSI capability structure */ +#define MC_MSI_CAP_CTRL_OFFSET 0xe0u +#define MC_MSI_MAX_Q_AVAIL (MC_NUM_MSI_IRQS_CODED << 1) +#define MC_MSI_Q_SIZE (MC_NUM_MSI_IRQS_CODED << 4) + +#define MC_IMASK_LOCAL 0x180 +#define PCIE_LOCAL_INT_ENABLE 0x0f000000u +#define PCI_INTS 0x0f000000u +#define PM_MSI_INT_SHIFT 24 +#define PCIE_ENABLE_MSI 0x10000000u +#define MSI_INT 0x10000000u +#define MSI_INT_SHIFT 28 +#define MC_ISTATUS_LOCAL 0x184 +#define MC_IMASK_HOST 0x188 +#define MC_ISTATUS_HOST 0x18c +#define MC_MSI_ADDR 0x190 +#define MC_ISTATUS_MSI 0x194 + +/* PCIe Master table init defines */ +#define MC_ATR0_PCIE_WIN0_SRCADDR_PARAM 0x600u +#define ATR0_PCIE_ATR_SIZE 0x1f +#define ATR0_PCIE_ATR_SIZE_SHIFT 1 +#define MC_ATR0_PCIE_WIN0_SRC_ADDR 0x604u +#define MC_ATR0_PCIE_WIN0_TRSL_ADDR_LSB 0x608u +#define MC_ATR0_PCIE_WIN0_TRSL_ADDR_UDW 0x60cu +#define MC_ATR0_PCIE_WIN0_TRSL_PARAM 0x610u + +/* PCIe AXI slave table init defines */ +#define MC_ATR0_AXI4_SLV0_SRCADDR_PARAM 0x800u +#define ATR_SIZE_SHIFT 1 +#define ATR_IMPL_ENABLE 1 +#define MC_ATR0_AXI4_SLV0_SRC_ADDR 0x804u +#define MC_ATR0_AXI4_SLV0_TRSL_ADDR_LSB 0x808u +#define MC_ATR0_AXI4_SLV0_TRSL_ADDR_UDW 0x80cu +#define MC_ATR0_AXI4_SLV0_TRSL_PARAM 0x810u +#define PCIE_TX_RX_INTERFACE 0x00000000u +#define PCIE_CONFIG_INTERFACE 0x00000001u + +#define ATR_ENTRY_SIZE 32 + +struct mc_msi { + struct mutex lock; /* Protect used bitmap */ + struct irq_domain *msi_domain; + struct irq_domain *dev_domain; + u32 num_vectors; + u64 vector_phy; + DECLARE_BITMAP(used, MC_NUM_MSI_IRQS); +}; + +struct mc_port { + void __iomem *axi_base_addr; + struct device *dev; + struct irq_domain *intx_domain; + raw_spinlock_t intx_mask_lock; + struct mc_msi msi; +}; + +static void mc_pcie_isr(struct irq_desc *desc) +{ + struct irq_chip *chip = irq_desc_get_chip(desc); + struct mc_port *port = irq_desc_get_handler_data(desc); + struct device *dev = port->dev; + struct mc_msi *msi = &port->msi; + void __iomem *bridge_base_addr = port->axi_base_addr + MC_PCIE1_BRIDGE_ADDR; + u32 status; + unsigned long intx_status; + unsigned long msi_status; + u32 bit; + u32 virq; + + /* + * The core provides a single interrupt for both INTx/MSI messages. + * So we'll read both INTx and MSI status. + */ + chained_irq_enter(chip, desc); + + status = readl_relaxed(bridge_base_addr + MC_ISTATUS_LOCAL); + while (status & (PCI_INTS | MSI_INT)) { + intx_status = (status & PCI_INTS) >> PM_MSI_INT_SHIFT; + for_each_set_bit(bit, &intx_status, PCI_NUM_INTX) { + virq = irq_find_mapping(port->intx_domain, bit + 1); + if (virq) + generic_handle_irq(virq); + else + dev_err_ratelimited(dev, "bad INTx IRQ %d\n", bit); + + /* Clear that interrupt bit */ + writel_relaxed(1 << (bit + PM_MSI_INT_SHIFT), bridge_base_addr + + MC_ISTATUS_LOCAL); + } + + msi_status = (status & MSI_INT); + if (msi_status) { + msi_status = readl_relaxed(bridge_base_addr + MC_ISTATUS_MSI); + for_each_set_bit(bit, &msi_status, msi->num_vectors) { + virq = irq_find_mapping(msi->dev_domain, bit); + if (virq) + generic_handle_irq(virq); + else + dev_err_ratelimited(dev, "bad MSI IRQ %d\n", bit); + + /* Clear that MSI interrupt bit */ + writel_relaxed((1 << bit), bridge_base_addr + MC_ISTATUS_MSI); + } + /* Clear the ISTATUS MSI bit */ + writel_relaxed(1 << MSI_INT_SHIFT, bridge_base_addr + MC_ISTATUS_LOCAL); + } + + status = readl_relaxed(bridge_base_addr + MC_ISTATUS_LOCAL); + } + + chained_irq_exit(chip, desc); +} + +static void mc_pcie_enable_msi(struct mc_port *port, void __iomem *base) +{ + struct mc_msi *msi = &port->msi; + u32 cap_offset = MC_MSI_CAP_CTRL_OFFSET; + u16 msg_ctrl = readw_relaxed(base + cap_offset + PCI_MSI_FLAGS); + + msg_ctrl |= PCI_MSI_FLAGS_ENABLE; + msg_ctrl &= ~PCI_MSI_FLAGS_QMASK; + msg_ctrl |= MC_MSI_MAX_Q_AVAIL; + msg_ctrl &= ~PCI_MSI_FLAGS_QSIZE; + msg_ctrl |= MC_MSI_Q_SIZE; + msg_ctrl |= PCI_MSI_FLAGS_64BIT; + + writew_relaxed(msg_ctrl, base + cap_offset + PCI_MSI_FLAGS); + + writel_relaxed(lower_32_bits(msi->vector_phy), base + cap_offset + PCI_MSI_ADDRESS_LO); + writel_relaxed(upper_32_bits(msi->vector_phy), base + cap_offset + PCI_MSI_ADDRESS_HI); +} + +static void mc_compose_msi_msg(struct irq_data *data, struct msi_msg *msg) +{ + struct mc_port *port = irq_data_get_irq_chip_data(data); + phys_addr_t addr = port->msi.vector_phy; + + msg->address_lo = lower_32_bits(addr); + msg->address_hi = upper_32_bits(addr); + msg->data = data->hwirq; + + dev_dbg(port->dev, "msi#%x address_hi %#x address_lo %#x\n", (int)data->hwirq, + msg->address_hi, msg->address_lo); +} + +static int mc_msi_set_affinity(struct irq_data *irq_data, const struct cpumask *mask, bool force) +{ + return -EINVAL; +} + +static struct irq_chip mc_msi_bottom_irq_chip = { + .name = "Microchip MSI", + .irq_compose_msi_msg = mc_compose_msi_msg, + .irq_set_affinity = mc_msi_set_affinity, +}; + +static int mc_irq_msi_domain_alloc(struct irq_domain *domain, unsigned int virq, + unsigned int nr_irqs, void *args) +{ + struct mc_port *port = domain->host_data; + struct mc_msi *msi = &port->msi; + void __iomem *bridge_base_addr = port->axi_base_addr + MC_PCIE1_BRIDGE_ADDR; + unsigned long bit; + u32 reg; + + WARN_ON(nr_irqs != 1); + mutex_lock(&msi->lock); + bit = find_first_zero_bit(msi->used, msi->num_vectors); + if (bit >= msi->num_vectors) { + mutex_unlock(&msi->lock); + return -ENOSPC; + } + + set_bit(bit, msi->used); + + irq_domain_set_info(domain, virq, bit, &mc_msi_bottom_irq_chip, domain->host_data, + handle_simple_irq, NULL, NULL); + + /* Enable MSI interrupts */ + reg = readl_relaxed(bridge_base_addr + MC_IMASK_LOCAL); + reg |= PCIE_ENABLE_MSI; + writel_relaxed(reg, bridge_base_addr + MC_IMASK_LOCAL); + + mutex_unlock(&msi->lock); + + return 0; +} + +static void mc_irq_msi_domain_free(struct irq_domain *domain, unsigned int virq, + unsigned int nr_irqs) +{ + struct irq_data *d = irq_domain_get_irq_data(domain, virq); + struct mc_port *port = irq_data_get_irq_chip_data(d); + struct mc_msi *msi = &port->msi; + + mutex_lock(&msi->lock); + + if (test_bit(d->hwirq, msi->used)) + __clear_bit(d->hwirq, msi->used); + else + dev_err(port->dev, "trying to free unused MSI%lu\n", d->hwirq); + + mutex_unlock(&msi->lock); +} + +static const struct irq_domain_ops msi_domain_ops = { + .alloc = mc_irq_msi_domain_alloc, + .free = mc_irq_msi_domain_free, +}; + +static struct irq_chip mc_msi_irq_chip = { + .name = "Microchip PCIe MSI", + .irq_mask = pci_msi_mask_irq, + .irq_unmask = pci_msi_unmask_irq, +}; + +static struct msi_domain_info mc_msi_domain_info = { + .flags = (MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS | MSI_FLAG_PCI_MSIX), + .chip = &mc_msi_irq_chip, +}; + +static int mc_allocate_msi_domains(struct mc_port *port) +{ + struct device *dev = port->dev; + struct fwnode_handle *fwnode = of_node_to_fwnode(dev->of_node); + struct mc_msi *msi = &port->msi; + + mutex_init(&port->msi.lock); + + msi->dev_domain = irq_domain_add_linear(NULL, msi->num_vectors, &msi_domain_ops, port); + if (!msi->dev_domain) { + dev_err(dev, "failed to create IRQ domain\n"); + return -ENOMEM; + } + + msi->msi_domain = pci_msi_create_irq_domain(fwnode, &mc_msi_domain_info, msi->dev_domain); + if (!msi->msi_domain) { + dev_err(dev, "failed to create MSI domain\n"); + irq_domain_remove(msi->dev_domain); + return -ENOMEM; + } + + return 0; +} + +static void mc_mask_intx_irq(struct irq_data *data) +{ + struct mc_port *port = irq_data_get_irq_chip_data(data); + void __iomem *bridge_base_addr = port->axi_base_addr + MC_PCIE1_BRIDGE_ADDR; + unsigned long flags; + u32 val; + + raw_spin_lock_irqsave(&port->intx_mask_lock, flags); + val = readl_relaxed(bridge_base_addr + MC_IMASK_LOCAL); + val &= ~PCIE_LOCAL_INT_ENABLE; + writel_relaxed(val, bridge_base_addr + MC_IMASK_LOCAL); + raw_spin_unlock_irqrestore(&port->intx_mask_lock, flags); +} + +static void mc_unmask_intx_irq(struct irq_data *data) +{ + struct mc_port *port = irq_data_get_irq_chip_data(data); + void __iomem *bridge_base_addr = port->axi_base_addr + MC_PCIE1_BRIDGE_ADDR; + unsigned long flags; + u32 val; + + raw_spin_lock_irqsave(&port->intx_mask_lock, flags); + val = readl_relaxed(bridge_base_addr + MC_IMASK_LOCAL); + val |= PCIE_LOCAL_INT_ENABLE; + writel_relaxed(val, bridge_base_addr + MC_IMASK_LOCAL); + raw_spin_unlock_irqrestore(&port->intx_mask_lock, flags); +} + +static struct irq_chip mc_intx_irq_chip = { + .name = "Microchip PCIe INTx", + .irq_mask = mc_mask_intx_irq, + .irq_unmask = mc_unmask_intx_irq, +}; + +static int mc_pcie_intx_map(struct irq_domain *domain, unsigned int irq, + irq_hw_number_t hwirq) +{ + irq_set_chip_and_handler(irq, &mc_intx_irq_chip, handle_simple_irq); + irq_set_chip_data(irq, domain->host_data); + + return 0; +} + +static const struct irq_domain_ops intx_domain_ops = { + .map = mc_pcie_intx_map, +}; + +static int mc_pcie_init_irq_domains(struct mc_port *port) +{ + struct device *dev = port->dev; + struct device_node *node = dev->of_node; + + port->intx_domain = irq_domain_add_linear(node, PCI_NUM_INTX, &intx_domain_ops, port); + if (!port->intx_domain) { + dev_err(dev, "failed to get an INTx IRQ domain\n"); + return -ENOMEM; + } + raw_spin_lock_init(&port->intx_mask_lock); + + return mc_allocate_msi_domains(port); +} + +static void mc_setup_window(void __iomem *bridge_base_addr, u32 index, phys_addr_t axi_addr, + phys_addr_t pci_addr, size_t size) +{ + u32 atr_sz = ilog2(size) - 1; + u32 val; + + if (index == 0) + val = PCIE_CONFIG_INTERFACE; + else + val = PCIE_TX_RX_INTERFACE; + + writel(val, bridge_base_addr + (index * ATR_ENTRY_SIZE) + MC_ATR0_AXI4_SLV0_TRSL_PARAM); + + val = lower_32_bits(axi_addr) | (atr_sz << ATR_SIZE_SHIFT) | ATR_IMPL_ENABLE; + writel(val, bridge_base_addr + (index * ATR_ENTRY_SIZE) + + MC_ATR0_AXI4_SLV0_SRCADDR_PARAM); + + val = upper_32_bits(axi_addr); + + writel(val, bridge_base_addr + (index * ATR_ENTRY_SIZE) + + MC_ATR0_AXI4_SLV0_SRC_ADDR); + + val = lower_32_bits(pci_addr); + writel(val, bridge_base_addr + (index * ATR_ENTRY_SIZE) + + MC_ATR0_AXI4_SLV0_TRSL_ADDR_LSB); + + val = upper_32_bits(pci_addr); + writel(val, bridge_base_addr + (index * ATR_ENTRY_SIZE) + + MC_ATR0_AXI4_SLV0_TRSL_ADDR_UDW); + + val = readl(bridge_base_addr + MC_ATR0_PCIE_WIN0_SRCADDR_PARAM); + val |= (ATR0_PCIE_ATR_SIZE << ATR0_PCIE_ATR_SIZE_SHIFT); + writel(val, bridge_base_addr + MC_ATR0_PCIE_WIN0_SRCADDR_PARAM); + writel(0, bridge_base_addr + MC_ATR0_PCIE_WIN0_SRC_ADDR); +} + +static int mc_setup_windows(struct platform_device *pdev, struct mc_port *port) +{ + void __iomem *bridge_base_addr = port->axi_base_addr + MC_PCIE1_BRIDGE_ADDR; + struct pci_host_bridge *bridge = platform_get_drvdata(pdev); + struct resource_entry *entry; + u64 pci_addr; + u32 index = 1; + + resource_list_for_each_entry(entry, &bridge->windows) { + if (resource_type(entry->res) == IORESOURCE_MEM) { + pci_addr = entry->res->start - entry->offset; + mc_setup_window(bridge_base_addr, index, entry->res->start, + pci_addr, resource_size(entry->res)); + index++; + } + } + + return 0; +} + +static int mc_platform_init(struct pci_config_window *cfg) +{ + struct device *dev = cfg->parent; + struct platform_device *pdev = to_platform_device(dev); + struct mc_port *port; + void __iomem *bridge_base_addr; + void __iomem *ctrl_base_addr; + int ret; + int irq; + u32 val; + + port = devm_kzalloc(dev, sizeof(*port), GFP_KERNEL); + if (!port) + return -ENOMEM; + port->dev = dev; + + port->axi_base_addr = devm_platform_ioremap_resource(pdev, 1); + if (IS_ERR(port->axi_base_addr)) + return PTR_ERR(port->axi_base_addr); + + bridge_base_addr = port->axi_base_addr + MC_PCIE1_BRIDGE_ADDR; + ctrl_base_addr = port->axi_base_addr + MC_PCIE1_CTRL_ADDR; + + port->msi.vector_phy = MC_MSI_ADDR; + port->msi.num_vectors = MC_NUM_MSI_IRQS; + ret = mc_pcie_init_irq_domains(port); + if (ret) { + dev_err(dev, "failed creating IRQ domains\n"); + return ret; + } + + irq = platform_get_irq(pdev, 0); + if (irq < 0) { + dev_err(dev, "unable to request IRQ%d\n", irq); + return -ENODEV; + } + + irq_set_chained_handler_and_data(irq, mc_pcie_isr, port); + + /* Hardware doesn't setup MSI by default */ + mc_pcie_enable_msi(port, cfg->win); + + val = PCIE_ENABLE_MSI | PCIE_LOCAL_INT_ENABLE; + writel_relaxed(val, bridge_base_addr + MC_IMASK_LOCAL); + + val = readl_relaxed(bridge_base_addr + MC_LTSSM_STATE); + val |= LTSSM_L0_STATE; + writel_relaxed(val, bridge_base_addr + MC_LTSSM_STATE); + + val = ECC_CONTROL_AXI2PCIE_RAM_ECC_BYPASS | ECC_CONTROL_PCIE2AXI_RAM_ECC_BYPASS | + ECC_CONTROL_RX_RAM_ECC_BYPASS | ECC_CONTROL_TX_RAM_ECC_BYPASS; + writel_relaxed(val, ctrl_base_addr + MC_ECC_CONTROL); + + val = PCIE_EVENT_INT_L2_EXIT_INT | PCIE_EVENT_INT_HOTRST_EXIT_INT | + PCIE_EVENT_INT_DLUP_EXIT_INT | PCIE_EVENT_INT_L2_EXIT_INT_MASK | + PCIE_EVENT_INT_HOTRST_EXIT_INT_MASK | PCIE_EVENT_INT_DLUP_EXIT_INT_MASK; + writel_relaxed(val, ctrl_base_addr + MC_PCIE_EVENT_INT); + + val = SEC_ERROR_INT_TX_RAM_SEC_ERR_INT | SEC_ERROR_INT_RX_RAM_SEC_ERR_INT | + SEC_ERROR_INT_PCIE2AXI_RAM_SEC_ERR_INT | SEC_ERROR_INT_AXI2PCIE_RAM_SEC_ERR_INT; + writel_relaxed(val, ctrl_base_addr + MC_SEC_ERROR_INT); + writel_relaxed(val, ctrl_base_addr + MC_SEC_ERROR_INT_MASK); + + val = DED_ERROR_INT_TX_RAM_DED_ERR_INT | DED_ERROR_INT_RX_RAM_DED_ERR_INT | + DED_ERROR_INT_PCIE2AXI_RAM_DED_ERR_INT | DED_ERROR_INT_AXI2PCIE_RAM_DED_ERR_INT; + writel_relaxed(val, ctrl_base_addr + MC_DED_ERROR_INT); + writel_relaxed(val, ctrl_base_addr + MC_DED_ERROR_INT_MASK); + + writel_relaxed(0, bridge_base_addr + MC_IMASK_LOCAL); + writel_relaxed(GENMASK(31, 0), bridge_base_addr + MC_ISTATUS_LOCAL); + writel_relaxed(0, bridge_base_addr + MC_IMASK_HOST); + writel_relaxed(GENMASK(31, 0), bridge_base_addr + MC_ISTATUS_HOST); + + /* Configure Address Translation Table 0 for PCIe config space */ + mc_setup_window(bridge_base_addr, 0, cfg->res.start & 0xffffffff, cfg->res.start, + resource_size(&cfg->res)); + + return mc_setup_windows(pdev, port); +} + +static const struct pci_ecam_ops mc_ecam_ops = { + .bus_shift = 20, + .init = mc_platform_init, + .pci_ops = { + .map_bus = pci_ecam_map_bus, + .read = pci_generic_config_read, + .write = pci_generic_config_write, + } +}; + +static const struct of_device_id mc_pcie_of_match[] = { + { + .compatible = "microchip,pcie-host-1.0", + .data = &mc_ecam_ops, + }, + {}, +}; + +MODULE_DEVICE_TABLE(of, mc_pcie_of_match) + +static struct platform_driver mc_pcie_driver = { + .probe = pci_host_common_probe, + .driver = { + .name = "microchip-pcie", + .of_match_table = mc_pcie_of_match, + .suppress_bind_attrs = true, + }, +}; + +builtin_platform_driver(mc_pcie_driver); +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("Microchip PCIe host controller driver"); +MODULE_AUTHOR("Daire McNamara ");